Forbidding Muslims Disassociating Themselves from One Another for More than Three Day

The believers are but brothers, so make peace between your brothers. (al-Hujurat 49:10)

Do not help one another in sinful, iniquitous acts and hostility; (in all your actions) (al-Maedah 5:2)

765. Abu Ayyub, may Allah be pleased with him, reported that the Messenger of Allah, peace and blessings be upon him, said, “It is not lawful for a Muslim to cut himself off from his brother for more than three nights so that when they meet this one turns aside and that one turns aside. The best of them is the one who greets the other first.” (Sahih al-Bukhari, Adab, 62; Sahih Muslim, Birr, 23).

766. Abu Hurayra, may Allah be pleased with him, reported that the Messenger of Allah, peace and blessings be upon him, said, “Actions are presented every Monday and Thursday, and Allah then forgives every man who does not associate anything with Him except for a man who has rancor for his brother. He says, ‘Wait until these two make it up!’” (Sahih Muslim, Birr, 36).

Nawawi, Imam. Riyad As-Salihin; The Gardens of the Righteous: A collection of authentic hadiths. Tughra Books Press, Inc. 2014